Exchange 2010 Version incorrect

Hi All,

We have just installed Exchange 2010 SP1 Update rollup 4v2 on all our 11 exchane 2010 servers but when you check the version of exchange using powershell command

"Get-ExchangeServer | fl name,admindisplayversion"

Checking out the following link http://social.technet.microsoft.com/wiki/contents/articles/exchange-server-and-update-rollups-builds-numbers.aspx should be displaying 14.1.323.6.

Add/Remove Programs shows two software updates for Exchange 2010 Update Rollup 4-v2 and Update Rollup 3v3 (KB2579150 and KB2529939).

Is this expected if not what have we done wrong?

Thanks

Richard